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Steel Plate Mass by Shape

Estimate plate mass from rectangular, square, circular or entered area, thickness, density and quantity.

  • Formula & worked example
  • Private in your browser
  • No signup
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

In initial display units, Length (L) 20, Width (W) 10, Thickness (t) 1, Quantity of plates 2, Density 8000 gives Area 200, Volume 200, Total weight 3.2.

Mass = area×thickness×density×quantity; circular area = π×diameter²/4.

Worked example

Enter these known values and leave the other values blank.

Steel type
Enter custom steel density
Length (L)
20 cm
Width (W)
10 cm
Thickness (t)
1 cm
Quantity of plates
2
Density
8000 kg/m³
Area
200 cm²
Volume
200 cm³
Total weight
3.2 kg

Assumptions and limitations

  • Plates have uniform thickness and density, without holes, bevels or coatings. Listed material densities are approximate presets, not certified values for a specific alloy, temperature or batch. Select the custom material option and supply verified density when required. Quantity must be a positive whole count.
  • Select compatible units and clear the quantity to solve before supplying the remaining measurements. Rounded purchase counts cannot uniquely recover a continuous dimension. Currency choices label amounts and do not convert exchange rates.

Common questions

How can I solve for a missing measurement?

Clear that field, then enter independent known values. Lock a known measurement to preserve it while changing another value. Procurement counts are rounded upward and cannot be reversed uniquely.

References

Bookify uses exact customary mass and volume definitions for density units, replacing rounded factors in the reference.

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